David Cameron is in for a rough ride from backbenchers over the controversial European Arrest Warrant (EWA).
Britain has to decide before 1 December whether to opt back in to the system, which allows EU countries to extradite suspects quickly at the request of other member states.
Conservative backbenchers are unhappy, saying the EWA is flawed and rejoining it will effectively hand over control of extradition to the European Court of Justice.
The home secretary, Theresa May, argues that Britain benefits from the EWA and says she has made improvements to extradition law to prevent countries using it for trivial offences and stop extradited Britons languishing for :
What, if anything, has the EAW done for us – and is the criticism justified?
Extraditions from Britain
Any EU state can issue an EAW for a crime carried out in its territory carrying a maximum penalty of at least one year in prison.
If another member state finds the suspect, it must arrest them and begin extradition proceedings.
Some states issue more warrants to Britain than others:
Poland issues more warrants by far than any other country for suspects living in the UK.